The remote web server is affected by multiple flaws.
The remote host is running Xerver, an open-source FTP and web server written in Java. The installed version of Xerver on the remote host suffers from several vulnerabilities that can be used by an attacker to reveal the contents of directories as well as the source of scripts and HTML pages. In addition, it is prone to a generic cross-site scripting flaw.
Upgrade to version 4.20 or higher.